Flushing valve



Patented. ou, 14, 1924;

ELUsI-:IING' vaLvE.

A y Application med July 17, 1923. Serial 17o. 652,126. i

To all 'whmnz't may concern:

Be it known that I, WILLIAM SEARs` WHITE, a citizen of the United States of America, and a resident of Denver, in the county of Deliver and State of Colorado.,

have invented a new and Improved Flushing Valve, of which the-following is a description.

My invention relates to flushing valves and more particularly to that type of valve including a oat piston movable in avertical cylinder and in which manually operated means is provided at the exterior of the valve to give 'rocking movement to a shaft to cause the piston'to be displaced to admit the iushing water.

The general object of the present invention is to improve in various particulars valves ofthe indicated type with a view to promote simplicit attain increased eiliciency, and provi e a novel means for variously regulating the flushing period.

The ynature of the invention, its distinguishing features and advantages, will clear! ly appear as the description proceeds.

Reference is vto be had to the accompanying drawings forming a part of this specitication, it being understood that the draw-Y ings are merely illustrative of practical examples of the invention.

Figure 1 is a side elevation of a ilushing` valve shown partly broken away and part of a discharge pipe being shown in vertical section;

Figure 2 is an enlarged vertical section of the valve and part of the flushing tankg' Figure 3 is a horizontal section on the line 33, Fig. 2.;

Figure 4 is a vertical section of the valve in a slightly modified form;

Figure 5 is a fragmentary vertical section showing a further slight modification;

Figure 6 is a detail of the upper portion of the piston showing a modification;

Figure 7 is a fragmenta horizontal sec' tion in the plane indicated y the line 7-7, Figure 6. i

In the illustrated example of my invention l the numeral 10 indicates a flushing tank mounted in which is a valve casing 11, the lower end of which has a chamber 12 PATENT orner-:J

wI'LLLur sEaEs WHITE, or DENVER, coLoBA-Do.

lil-:ISSUED to seat on an annular ange 16y at the baseof the casing 11. J ournaled in the chamber eXtensIon 1Q is-a rock shaft 17 having alaterally bent' handle 18. On the rock shaft 17 1s a lateral arm 19 extendinxr into the chamber 12 and secured to the llower end of a vertlcal pin 20. The pin 20 extends upwardly through bottom of the float piston 15. The plston 15 is provided with a tube 21 surrounding the upper end of the pin 20 Iand spacedA therefrom. The sleeve 21 is slotted at its lower end as at 22 and near the upper end has holes 23. The space 121 between the tube 21 and pin 20 forms a passage for air and water as will appear.

Above the pin 20 thefloat valve 15 has a ball 24 at the top "of which seats a ball valve or uivalent valve 25. Said valve has a cham r 26 beneath acap 27 on the piston, in the top of the casing 11 in the construction shown in Figures 1 to 3. Near the top of the casing 11 is a spider or partition 28 affording a flow of air and v'water and above the partition is a cap 29 having a depending headed pin 30 movable in a ventral hole 31 of partition 28. The lower end of the piston 15 is closed by a hollow screw plug 32 through a hole 33 in which the vertical pin 20 has movement into the tube 21. In the chamber 26 is a second valve 34 controlling the-upper end of vertical passage 25 in the bottom of the chamber 26 to establish communication between said chamber 26 and the chamber 111 or upper.

valve 34 and when the chamber 26 and its valve are raised, water will pass through the tube 21 and through the discharge pipe 13. Water permitted to pass through the inlet slots 14 and thence to the discharge pipe 13, exerts a downward pull on the piston 15. As the piston descends it tends to create a vacuum in the chamber 111, which vacuum is broken by the air within the hollow piston 15 being allowed to pass by the valve 25 and beneath the valve 34 through the passage to chamber 111, it being understood that the valve 34 does not fit tightly on its seat but that a limited passage is provided beneath the valve by the formation of the seat.

` The downward pull ofthe water on the pisvton 15 finally seats the latter. The piston 15 is not tight in the casing 11 but permits the flow of water from the inlet 14 between the piston and said casing to the chamber 111, producing a pressure and cushion in said chamber, tending to cause the piston to seat without producing a water hammer. After the pist-on 15 is seated the water which has passed into the hollow piston 15 and displaced air while the piston is in operation, will escape through the slots 32 and hole 33 and the piston will again beilled with air so that the valve is ready for another operation. The valve 34 acts as a trap to prevent the contents of the hollow piston from passing toofreely into the chamber 111 and a predetermined flushing period can be had by regulating the low between the valve 34 and its seat; The loose cap 29 because of having limited vertical movement permits air to passl through the spider 28 and outward :from the top of the chamber 111 to the top` of the tank 39 or to a supply pipe to finally pass, if desired,v to auxiliary air storage chambers provided in connection with some forms of valves of this general type. l

`In the form shown in Figure 4 the casing 111 corresponds essentially with the casing .11, except that at its base below the inlet 114 the casing is formed integral with an outer housing or shell 110 to contain water, in lieu of the tank 10. Said housing 110 has a cap 36 which secures the flanged lower end on an Ainlet pipe 37 leading into the top of said housing. The casing 111 and its appurtenances as well as the valve and its operating and controlling pin 20 are the same as in the previously described construction except that the casing 111 above the loose cap 29 has an integral extension 38 communicating directly with the inlet pipe 37. Said inlet pipe 37 may lead from a tank or supply pipe 39.

In the form shown in Figure 5 the construction is the same as in yFigure 4 except that the cap 29 and pin 30 are omitted. In-

stead of. the spider or partition 28, a closed top 128 1s provided on the casing 111, In the munication between the piston and the said constructions shown inFigure 4 and also in Figure 5 the extension 33 has lateral openings 40 above the casing which in Figure 5 is designated 211. lVater may iow from the pipe 37 through the extension 3S and outwardly through the openings 40 to the space between the casing 111 and the ,housing thence to the inlet 114.

In Figures 6 and 7 in lieu of the valve 34 and passage 35 an equivalent check valve assemblage is provided, comprising an annular resilient band 134 controlling lateral openings 135 that establish communication between the chamber 126 corresponding with the chamber 26 whereby to control communication between the chamber 111 of casing 11 and the interior of the hollow piston 15 through the passage 221 corresponding with the passage 121.

I would state in'conclusion that while the illustrated examples constitute practical embodiments of my invention, I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can vbe considerably varied without departure from the spirit of the invention as defined in the appended claims. n

Having thus described my invention, I claim:

1. A valve of the class described comprising a casing havin an inlet for water near its lower end, a ho low piston operating in lsaid casing and formed with a separate chamber at the top of the piston, said piston having a passage establishing communication between the piston and the said chamber, a valve controlling said passage, a second valve controlled passage leading from nsaid chamber to the interior of said casing, and manually operable means to displace the first-mentioned valve and cause the piston to rise in said casing above the said. inlet.

2. A valve of the class described comprisingI a casing having an inlet for water near its lower end, a hollow piston operating in said casing and formed with a separate chamber at the top of the piston, said piston having a passage establishing communication between the piston and the said chamber, a valve controlling said passage, a second valve controlled passage leading *from said chamber to the interior of said casing, and a manually movable pin exten-l ding upwardly through the bottom of the casing and adapted to displace the firstmentioned valve and cause the piston to rise in the casing.

3. A valve of the class described comprising a casing having an inlet for water near its lower end, a hollowr piston operating in said casing'and formed with a separate chamber at the top of the piston, said piston having a passage establishing comchamben a valve controlling said passage,y -risein the casing; together with a tube in a second lvalve controlled passage leadin the hollow piston surrounding said pin and from saidl chamber to the interior of.sai slotted at its lower end, the lower end of 10 easing, and a. manually movable pin extendthe piston having a hole for the inow and 5' ing upwardly through the bottom of the outflow of water. y

` Acasing ,and adapted to displace the irstmentioned valve and cause the piston to WILLIAM SEARS WHITE. 

